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865 Jarvis Dr <br /> Sequoia Mcrgin Hill,CA 95037 <br /> (408)776-9600 <br /> Analytical FAX(408)782-6308 <br /> www sequoialabs can <br /> . Stratus Environmental Inc Project ARCO#2130 MLL0779 <br /> 3330 Cameron Park Dr,Suite 550 Project plumber ARCO#2130,Stockton,CA Reported <br /> Cameron Park CA,95682 Project Manager Jay Johnson 01/10/03 16 20 <br /> xasoline(2-Methylpentane to 1,2,4-Trimethylbenzene)and BTEX by EPA 8015M and 8021B - Quality Contra <br /> Sequoia Analytical- Sacramento <br /> Reporting Spike Source %REC RPD <br /> Analyte Result Limit Units Level Result %REC Limits RPD Limit Notes <br /> Batch 3010016-EPA 5030B(PIT) <br /> Blank(3010016-BLKI) Prepared&Analyzed 01/01/03 <br /> Purgeable Hydrocarbons ND 50 ugA <br /> Benzene ND 050 " <br /> Toluene ND 050 " <br /> Ethylbenzene ND 050 " <br /> Xylenes(total) ND 050 " <br /> Surrogate a a a-Tnfluorotoluene 868 100 87 60-140 <br /> Blank(30100I6-BLK2) Prepared&Analyzed 01/02/03 <br /> Purgeable Hydrocarbons ND 50 u8/1 <br /> Benzene ND 050 " <br /> Toluene ND 050 " <br /> iEthylbenzene ND 050 <br /> Xylenes(total) ND 050 " <br /> Surrogate a a a-Tnfluorotoluene 894 " 100 89 60-140 <br /> Laboratory Control Sample(3010016-BS1) Prepared&Analyzed 01/01/03 <br /> Benzene 106 050 ug/l 100 106 70-130 <br /> Toluene 106 050 100 106 70-130 <br /> Ethylbenzene 999 050 100 100 70-130 <br /> Xylenes(total) 308 050 300 103 70-130 <br /> Surrogate a a a-Trtfluorotoluene 119 100 119 60-140 <br /> Laboratory Control Sample(3010016-BS2) Prepared&Analyzed 01/02/03 <br /> Benzene 994 050 ug/l 100 99 70-130 <br /> Toluene 102 050 100 102 70-130 <br /> Ethylbenzene 102 050 100 102 70-130 <br /> Xylenes(total) 302 050 300 101 70-130 <br /> Surrogate aa a-Tnfluorotoluene 108 100 108 60-140 <br /> Sequoia Analytical-Morgan Hill The results in this report apply to the samples analyzed in accordance with the chain of <br /> . custody document Unless otherwise stated results are reported on a wet weight basis <br /> This analytical report must be reproduced in its entirety <br /> 11 of 17 <br />